Antislipping attachment



April 16, 1929. T, RYAN I 1,709,686

ANTI SLIPPING ATTACHMENT Filed. May 5, 192'?" v Patented Apr. 15, 1929.

pairs stares lama? or BUFFALO, New YORK, Assreivon or ONE-HALF To Joria m I-I. w. KUHLMANN, or BLUE LAKE, CALIFORNIA. f

THOMAS :0. RYAN,

tries.

ANTISLIPPING ATTACHIvIENT.

Application filed May 5,

. This invention relates to an anti-slipping attachment for canes, crutches and the li one of the objects being to provide a simple and efficient device of this character which can be applied readily to an article such as" stated and which can be quickly adjusted either active or inactive position, means being employed for holding it firmly'in either the two positions mentioned.

With the foregoing and other objects claimed, it being understood that changes the precise embodiment of the invention herein disclosed may be made withinthe scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawings the pre-I ferred form of the invention has been shown.

1 In said drawings,

Figure 1 1s a view partly in elevation and partly in section showing the device as in use to prevent slipping.

Figure 2 is an elevation showing the parts assembled as 1n Figure 1 but viewed at right reference 1 designates the shank portion of a cane or crutch provided, at its lower end, with the usual rubber ferrule or tip 2.

The attachment constituting thepresent invention includes a yoke 3 having opposed arms 4- which are extended to diametrically line 33, Figure 2.

opposite points on the shank 1 and attached to the shank by means of pivot pins 5 extending into the shank. The yoke 3 straddles the shank and is provided at one end with a laterally extended ear 6 to which is pivotally connected a retaining latch 7. Another ear 8 isextended laterally from the other end of the yoke and has a keeper 9 thereon. When the yoke is in engagement with theshank 1 the latch 7 can SWlIl into en a ement with the keeper 9, thereby to hold the yoke and the a 4 against movement relative to the shank and I retaining the arm substantially parallel w the longitudinal axis of the shank 1.

ith

1927. Serial No. 189,075.

A cup-like foot 10-is provided for receiving the lower end of the tip 2, this foot being formed with a spur 11 extending'therefrom. Diametricallyfopposed arms 12 extend from thecup and are pivotallyconnected to the arms 4 at points between the yoke 3 andthe pivot 5,as shown at 13.

, Whenthe attachment is notin use the foot .10 is in engagement with a spring finger 14 extending from the shank 1, the foot being swung onto this finger by pressing it there against. 7 I n At this time the yoke 3 is astride the shank 1 and held thereto by meansof the latch 7. When it is desired to use the attachment to prevent slipping the latch 7 is moved to release the yoke 3 and said yoke is swung downwardly after the foot 10 has been disengaged from the finger 14. This-downward movement will be suflicientto bring the foot- 10 beneath the end-0f the tip 2 whereupon this foot can be swung to position underthe tip. By then swinging the yoke 3 upwardly the arm 4 will pull on the arm 12 with the result that the cup-like foot 10 will move onto the lower end of the tip 2 asshown in Figures 1 and 2 and the yoke 3 will again be. brought 7 of the latch 7. V v

With the parts thus located they cannot become accidentally displaced relative to each other and the spur 10 will act to prevent slipping, as'will be obvious.

The attachment herein cially usefulon wet or frozen surfaces. What is claimed is: i

' astride shank 1 where it can be held by means described is espe 1. The combination with a shank, and a tip 7 upon the end of the shank, of a yoke, lever arins extending therefrom pivotally connected to the shank, said yoke being movable into and out of position astride theshank, means for fastening the yoke in position when astride the shank, a cup-likefoot,means thereon for engaging a surface to prevent slipping, arms connecting the foot to the arms of the yoke, said yoke and arms'being movable relative to the shank to shift the foot into and out of position about the end of the tip, and means on theshank for extending into the foot to hold said foot in inactive position above the tip.

2. The combination with a shank, and a tip uponthe end of the shank, ofa yoke, lever V through-the arms and into the shank for pivshank while astride the shank, a cup-like foot,

means thereon for engaging a surface to pro vent slipping, and spaced arms integral with the foot and pivotally connected to the respec- 10 tive arms of the yoke.

In testimony that I claim the foregoing; as my own, I have hereto affixed my signature.

THOMAS D. RYAN.

otally connecting the arms to the shank, said yoke being movable into and out of position astride the shank, a retaining latch connected 5 to the yoke for bridging the same to hold the yoke against pivotal movement relative to the 

